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    • AR-15 Complete Uppers
    • 204 Ruger Uppers
    • 20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail
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  • 20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail
  • 20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail
  • 20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail 20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail

    20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail

    AR15 Elite

    MSRP:
    Was:
    Now: $359.99
    (You save )
    (4 reviews) Write a Review

    SKU:
    20204UAHB1X12SSA215MLR
    • AR-15 Charging Handle | Standard Milspec
    • AR-15 Charging Handle | Tactical Extended Latch | Gen 2
    • AR-15 Charging Handle | Tactical Extended Latch | Gen 4
    • AR-15 Ambidextrous Charging Handle | Ambi Latch
    • 5.56/223 Bolt Carrier Group AR-15 | Nitride Milspec BCG
    • 5.56/223 Bolt Carrier Group AR-15 | Nickel Boron NIB Milspec BCG
    • Muzzle Compensator 1/2x28 Threads AR-15 | Black
    • Linear Compensator 1/2x28 Threads AR-15 | Black
    • Superlative Arms .750” Adjustable Gas Block | Stainless Steel | Solid, Set Screw | Melonite Finish AR-15
    • CMMG ZEROED Adjustable Gas Block .750" | AR-15 LR-308 Steel Black
    • 5.56/223 30 rd Magazine | Magpul | PMAG Gen 2 MOE AMG571-blk
    • 5.56/223 30 rd Magazine w/ WINDOW | Magpul | PMAG Gen 2 MOE
    • 5.56/223 10 rd Magazine | Magpul | PMAG Gen M3 MAG559-BLK
    • 5.56, 223 30 rd Magazine | ASC | Stainless Steel Black
    • 5.56/223 10 rd Magazine | ASC | Aluminum Grey Moly
    • Cerakote | FDE Fat Dark Earth
    • Cerakote | OD Green
    • Cerakote | FDE Fat Dark Earth
    • Cerakote | OD Green

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    • Overview
    • Reviews

    Product Description

    20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail

    Our AR15 Elite AR-15 uppers are American Made and machined by manufacturers of mil-spec AR-15 components.  All barrels are individually checked for headspace using Manson go and no-go gauges.

    Specifications: 

    • Upper Receiver: AR15 Milspec forged aluminum upper receiver with forward assist and dust cover assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class 2. Forged from 7075 T6 aluminum.  7075 Aluminum is superior in strength to 6061 billet aluminum.
    • Handguard: Premium, Lightweight 15" Extended Rifle Length Narrow-Profile AR15 M LOK Handguard. Fit and finish on our line of ergonomical free float rails is outstanding and light weight. M LOK slots run the entire length of our rail at the 3, 6, and 9 o'clock positions. M LOK compatible rail sections and attachments can easily be attached to our handguards which makes adding accessories like sights, bipods, flash lights, grips, lasers, etc. a breeze.  Matte black hard coat anodized Mil 8625 Type 3 Class 2. Milled from 6061 aircraft aluminum.
    • Barrel: Shaw Barrels Match Grade 20 inch 204 Ruger 416R Stainless Steel HBAR profile Barrel with 1x12 twist. 1/2x28 muzzle threads. Standard AR15 Barrel Extension w/M4 feed ramp.  Properly headspaced with Manson Go and No-Go Gauges.
    • Gas Block: .750” Low Profile, Nitride Finish.
    • Gas System: Rifle Length Gas Tube.
    • Muzzle Device: A2 flash hider with crush washer.
    • Charging Handle: NOT INCLUDED
    • Bolt Carrier Group: NOT INCLUDED

    Upper arrives assembled, ready to use and will fit all standard Milspec dimension AR 15 lower receivers.

    This item is NOT a firearm and will be shipped directly to you, no FFL is required.

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    20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail
    AR15 Elite
    20" 204 Ruger AR-15 Upper Assembly | SHAW Barrel | 1x12 SS Rifle HBAR Barrel | Flash Hider | 15" MLOK Rail

    4 Reviews Hide Reviews Show Reviews

    • 5
      204 20 inch upper

      Posted by S. Farlow on Feb 2nd 2026

      Delivered to me very fast and packed well. The FDE cerakote that I got was beautiful. This is by far the best shooting upper in my arsenal for accuracy. I loves 35 gr vmax. Groups were almost touching and that's probably my fault. Bring on the prairie dogs.

    • 5
      204 upper 20 inch

      Posted by Alex Fresno on Dec 28th 2025

      This turned out to be what I hoped for. Well made and performs better then expected. Referred some guys at my range to you all. Keep up the good work!

    • 5
      204 Upper Assembly

      Posted by Terrance Ashton on Dec 5th 2025

      Planning a prairie dog hunt in the spring and this is what I'm taking with me. Furthest shot I'm told is 300 yards so with some good glass, this is plenty. Already getting 1" groups with some hornady 35 gr vmax factory so should improve with my hand loads.

    • 5
      Shipped quick.

      Posted by Victor Kiger on Nov 24th 2025

      Got it out to me next day, so thats impressive. Very satisfied with grouping at 100. Got right at 1" MOA with some cheap factory loads but I'm sure with match or handloads it will be 1/2" or so.

    Frequently Asked Questions

    What are 204 Ruger Uppers?

    204 Ruger Uppers are upper receivers compatible with .204 ammunition and the AR-15 rifle platform. One of the distinct advantages of the ammunition is that its small caliber and high muzzle velocity make it an ideal varmint hunting round.

    What is the Effective Range of the 204 Ruger Upper?

    The effective range of 204 Ruger Upper is approximately 500 yards, making it a fantastic choice for varmint hunting, especially when paired with a high quality scope.

    What Makes 204 Ruger Uppers Such a Good Weapon for Varmint Hunting?

    Varmint hunting requires accuracy and speed, due to the smaller size and quickness of the target. A 204 Ruger upper achieves this with less wind drift, faster flight time and less arcing (the rounds fly flatter) than your traditional .223 or 22-250 rounds.

    What is the Muzzle Velocity of a 204 Ruger Upper?

    The muzzle velocity of a 204 Ruger Upper receiver is 4200 feet per second, making it the second-highest muzzle velocity available on the AR-15 platform. This extremely high muzzle velocity combined with high BC bullets make 204 Ruger uppers exceptionally accurate.

    What is the Minute Angle of a 204 Ruger Upper?

    The 204 Ruger Upper receiver is capable of delivering a ½ MOA (minute of angle) at 100 yards and can hit targets with incredible accuracy at 270 yards, as though they were point-blank shots. Of course, MOA isn’t just determined by the rifle, but the shooter, too.

    Why is the Smaller Caliber of the 204 Ruger Upper an Advantage?

    Shooting small game requires a small caliber round to minimize damage. The greater susceptibility to wind drift is compensated by the high muzzle velocity of 204 Ruger ammo.

    What BCG do I use with a 204 Ruger Upper?

    204 Ruger Uppers use the standard 223/556 Bolt Carrier Group (BCG).

    What Magazine do I use with a 204 Ruger Upper?

    204 Ruger Uppers use the standard 223/556 Magazine.

    ×
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